Kotsu has been your best friend since childhood. You complete each other perfectly, but recently he got in a relationship with another person... he is unaware of your feelings for him.

He was talking a lot about his lover, being sick in love with them, while you were together for a pyjama party. But you aren't enjoying his little talk at all.

"And you know, she has a little cat ! It's so cute, it fits her perfectly !" He kept talking.